Limits...
Physics at the [Formula: see text] linear collider.

Moortgat-Pick G, Baer H, Battaglia M, Belanger G, Fujii K, Kalinowski J, Heinemeyer S, Kiyo Y, Olive K, Simon F, Uwer P, Wackeroth D, Zerwas PM, Arbey A, Asano M, Bagger J, Bechtle P, Bharucha A, Brau J, Brümmer F, Choi SY, Denner A, Desch K, Dittmaier S, Ellwanger U, Englert C, Freitas A, Ginzburg I, Godfrey S, Greiner N, Grojean C, Grünewald M, Heisig J, Höcker A, Kanemura S, Kawagoe K, Kogler R, Krawczyk M, Kronfeld AS, Kroseberg J, Liebler S, List J, Mahmoudi F, Mambrini Y, Matsumoto S, Mnich J, Mönig K, Mühlleitner MM, Pöschl R, Porod W, Porto S, Rolbiecki K, Schmitt M, Serpico P, Stanitzki M, Stål O, Stefaniak T, Stöckinger D, Weiglein G, Wilson GW, Zeune L, Moortgat F, Xella S, Bagger J, Brau J, Ellis J, Kawagoe K, Komamiya S, Kronfeld AS, Mnich J, Peskin M, Schlatter D, Wagner A, Yamamoto H - Eur Phys J C Part Fields (2015)

Bottom Line: A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics.The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons.The connection to cosmology has been analysed as well.

View Article: PubMed Central - PubMed

Affiliation: II. Institute of Theoretical Physics, University of Hamburg, 22761 Hamburg, Germany ; Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, 22603 Hamburg, Germany.

ABSTRACT

A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well.

No MeSH data available.


95% confidence level contours for a measurement of  at the LHC and a  LC. We use Sfitter [459] for the LHC results and we adopt the linear collider uncertainties of reference [458]
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Fig85: 95% confidence level contours for a measurement of at the LHC and a LC. We use Sfitter [459] for the LHC results and we adopt the linear collider uncertainties of reference [458]

Mentions: The precision to which invisible decays can be studied at the LHC is ultimately limited by the machine’s systematics which will saturate at luminosities , see Fig. 85. Bounds on visible decays are typically expressed as ratios to the SM expectation, which, for the lighter state, can be rephrased in the portal model for either or initial stares73\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} \dfrac{\sigma [i \rightarrow H_1 \rightarrow F]}{\sigma [i \rightarrow H_1 \rightarrow F]^\text {SM}} = \dfrac{\cos ^2\chi }{1 + \tan ^2\chi \, [{{\varGamma }^\text {hid}_1}/{{\varGamma }^\text {SM}_{\text {tot},1}}]} \le \mathscr {R}_1 , \end{aligned}$$\end{document}σ[i→H1→F]σ[i→H1→F]SM=cos2χ1+tan2χ[Γ1hid/Γtot,1SM]≤R1,where denotes the observed exclusion limit (signal strength). An identical quantity can be derived from future constraints on invisible decays74\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} \dfrac{\sigma [i \rightarrow H_1 \rightarrow inv]}{\sigma [i \rightarrow H_1]^\text {SM}} = \dfrac{\sin ^2\chi \, [{\varGamma }^\text {hid}_1 / {\varGamma }^\text {SM}_{\text {tot},1}]}{1 + \tan ^2\chi \, [{{\varGamma }^\text {hid}_1}/{{\varGamma }^\text {SM}_{\text {tot},1}}]} \le \mathscr {J}_1 . \end{aligned}$$\end{document}σ[i→H1→inv]σ[i→H1]SM=sin2χ[Γ1hid/Γtot,1SM]1+tan2χ[Γ1hid/Γtot,1SM]≤J1.Similar relations hold for , and there are portal-specific sum rules which facilitate the reconstruction of the mixing angle from measurements of and ,75\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} {\mathscr {R}}_1+{\mathscr {J}}_1=&\cos ^2\chi \,,\nonumber \\ {\mathscr {R}}_2+{\mathscr {J}}_2=&\sin ^2\chi \,. \end{aligned}$$\end{document}R1+J1=cos2χ,R2+J2=sin2χ.While the LHC running at 14 TeV will eventually probe small visible production cross sections (Eq. (74) becomes an equality), the invisible decay searches at the LHC will most likely yield a 95 % confidence level bound [473] on [466] rather than a statistically significant observation. The bounds can be vastly improved by performing by performing precision spectroscopy of the 125-GeV Higgs candidate in the associated production channel at, e.g., a 350 GeV LC (see also Ref. [474]). Still, invisible Higgs searches that solely provide upper limits on both are not enough to fully reconstruct the portal model if a second Higgs-like state is discovered as a result of Eq. (75). Only the precise measurement, which is impossible at the LHC, solves this predicament, but an LC is the perfect instrument to pursue such an analysis in the associated production channel.


Physics at the [Formula: see text] linear collider.

Moortgat-Pick G, Baer H, Battaglia M, Belanger G, Fujii K, Kalinowski J, Heinemeyer S, Kiyo Y, Olive K, Simon F, Uwer P, Wackeroth D, Zerwas PM, Arbey A, Asano M, Bagger J, Bechtle P, Bharucha A, Brau J, Brümmer F, Choi SY, Denner A, Desch K, Dittmaier S, Ellwanger U, Englert C, Freitas A, Ginzburg I, Godfrey S, Greiner N, Grojean C, Grünewald M, Heisig J, Höcker A, Kanemura S, Kawagoe K, Kogler R, Krawczyk M, Kronfeld AS, Kroseberg J, Liebler S, List J, Mahmoudi F, Mambrini Y, Matsumoto S, Mnich J, Mönig K, Mühlleitner MM, Pöschl R, Porod W, Porto S, Rolbiecki K, Schmitt M, Serpico P, Stanitzki M, Stål O, Stefaniak T, Stöckinger D, Weiglein G, Wilson GW, Zeune L, Moortgat F, Xella S, Bagger J, Brau J, Ellis J, Kawagoe K, Komamiya S, Kronfeld AS, Mnich J, Peskin M, Schlatter D, Wagner A, Yamamoto H - Eur Phys J C Part Fields (2015)

95% confidence level contours for a measurement of  at the LHC and a  LC. We use Sfitter [459] for the LHC results and we adopt the linear collider uncertainties of reference [458]
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
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getmorefigures.php?uid=PMC4537698&req=5

Fig85: 95% confidence level contours for a measurement of at the LHC and a LC. We use Sfitter [459] for the LHC results and we adopt the linear collider uncertainties of reference [458]
Mentions: The precision to which invisible decays can be studied at the LHC is ultimately limited by the machine’s systematics which will saturate at luminosities , see Fig. 85. Bounds on visible decays are typically expressed as ratios to the SM expectation, which, for the lighter state, can be rephrased in the portal model for either or initial stares73\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} \dfrac{\sigma [i \rightarrow H_1 \rightarrow F]}{\sigma [i \rightarrow H_1 \rightarrow F]^\text {SM}} = \dfrac{\cos ^2\chi }{1 + \tan ^2\chi \, [{{\varGamma }^\text {hid}_1}/{{\varGamma }^\text {SM}_{\text {tot},1}}]} \le \mathscr {R}_1 , \end{aligned}$$\end{document}σ[i→H1→F]σ[i→H1→F]SM=cos2χ1+tan2χ[Γ1hid/Γtot,1SM]≤R1,where denotes the observed exclusion limit (signal strength). An identical quantity can be derived from future constraints on invisible decays74\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} \dfrac{\sigma [i \rightarrow H_1 \rightarrow inv]}{\sigma [i \rightarrow H_1]^\text {SM}} = \dfrac{\sin ^2\chi \, [{\varGamma }^\text {hid}_1 / {\varGamma }^\text {SM}_{\text {tot},1}]}{1 + \tan ^2\chi \, [{{\varGamma }^\text {hid}_1}/{{\varGamma }^\text {SM}_{\text {tot},1}}]} \le \mathscr {J}_1 . \end{aligned}$$\end{document}σ[i→H1→inv]σ[i→H1]SM=sin2χ[Γ1hid/Γtot,1SM]1+tan2χ[Γ1hid/Γtot,1SM]≤J1.Similar relations hold for , and there are portal-specific sum rules which facilitate the reconstruction of the mixing angle from measurements of and ,75\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} {\mathscr {R}}_1+{\mathscr {J}}_1=&\cos ^2\chi \,,\nonumber \\ {\mathscr {R}}_2+{\mathscr {J}}_2=&\sin ^2\chi \,. \end{aligned}$$\end{document}R1+J1=cos2χ,R2+J2=sin2χ.While the LHC running at 14 TeV will eventually probe small visible production cross sections (Eq. (74) becomes an equality), the invisible decay searches at the LHC will most likely yield a 95 % confidence level bound [473] on [466] rather than a statistically significant observation. The bounds can be vastly improved by performing by performing precision spectroscopy of the 125-GeV Higgs candidate in the associated production channel at, e.g., a 350 GeV LC (see also Ref. [474]). Still, invisible Higgs searches that solely provide upper limits on both are not enough to fully reconstruct the portal model if a second Higgs-like state is discovered as a result of Eq. (75). Only the precise measurement, which is impossible at the LHC, solves this predicament, but an LC is the perfect instrument to pursue such an analysis in the associated production channel.

Bottom Line: A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics.The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons.The connection to cosmology has been analysed as well.

View Article: PubMed Central - PubMed

Affiliation: II. Institute of Theoretical Physics, University of Hamburg, 22761 Hamburg, Germany ; Deutsches Elektronen Synchrotron (DESY), Hamburg und Zeuthen, 22603 Hamburg, Germany.

ABSTRACT

A comprehensive review of physics at an [Formula: see text] linear collider in the energy range of [Formula: see text] GeV-3 TeV is presented in view of recent and expected LHC results, experiments from low-energy as well as astroparticle physics. The report focusses in particular on Higgs-boson, top-quark and electroweak precision physics, but also discusses several models of beyond the standard model physics such as supersymmetry, little Higgs models and extra gauge bosons. The connection to cosmology has been analysed as well.

No MeSH data available.